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Those types of kicks - landed when one fighter is on the floor - are illegal in the UFC and many other promotions because they're considered too dangerous, but are still allowed in some leagues.

Lisita's arms came up involuntarily after copping the blow - a response to being concussed - and a medical professional rushed into the Octagon.

Mookie Alexander of MMA website Bloody Elbow described the KO as an act of "pure violence".

According to Alexander, Nastyukhin has used a soccer kick as the finishing move in each of his victories in the ONE Championship. The win was the fifth time he's ended a fight in less than a minute while it was his third first-round knockout.

His record now stands at 10-2, while Lisita's has moved to 14-8.

The ONE Championship is Asia's largest MMA organisation and hosts fights throughout the region.